Find a childrens movie whey they find a city or new land at the top of a mountain

Movies
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find a childrens movie whey they find a city or new land at the top of a mountain. it might be a disney movie. it might be 1965-1980

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2

Maybe?:
It is a 1974 Disney movie.

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3

Another guess:
It is a 1975 Disney movie.

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4

Or maybe this one?:

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